Kamal Meattle on how to grow your own fresh air (4:07)

Researcher Kamal Meattle shows how an arrangement of three common houseplants, used in specific spots in a home or office building, can result in measurably cleaner indoor air.

With its air-filtering plants and sustainable architecture, Kamal Meattle’s office park in New Delhi is a model of green business. Meattle himself is a longtime activist for cleaning up India’s air. (From Ted.com)